Firstly, in order to know the seed phrase, the other half must understand how to use it. Just like that, a set of words will mean little to a person far from bitcoin. But if we talk about the family, then in a normal family there should be some kind of common budget, and each of the spouses can have personal money, provided that both partners work. But if necessary, all personal money, of course, turns into a common one..
I know that in Eastern families, money is always controlled by a man, and women have to constantly depend on him. In my opinion, this is not entirely fair, although, of course, I will not judge the customs of other countries.

When a man gets married to a woman to become husband and wife, they become one and everyone expects that they can get to share everything with each other. I know of women who have the passwords to their husbands bank cards and they can make withdrawals on his behalf. I will like to ask the Men here if they have shared their seed phrase with their wife's? I will like to ask the women here how they will feel if their husbands refuse telling them their seed phrase?

Leaving sentiments asides, will you advise someone to still buy some Bitcoins (Not up to the value of 1)  if they have an amount of money that will be okay to purchase the equivalent of 1 of a good altcoin with a strong community? Is having some bitcoins (in decimals) more valuable still than having the value of one good altcoin?